Alfred thurlow



(No Model.)

.A. THURLOW. v Lamp Burner.

No. 241,755. Patented May 17,1881

7 23 firI amazi J1621$Q0 V I N, PETER!v Phviu-Liihognphor, Wnhlngion. D.C.

UNITED STATES PATENT OFFICE.

ALFRED THURLOW, or ATHERSTONE, COUNTY on WARWICK, ENGLAND.

LAMP-BURNER.

SPECIFICATION forming part of Letters Patent No. 241,755, dated May 17,1881. Application filed January '1, 1881. (No model.) Patented inEngland December 2, 1880.

To all whom it may concern:

Be it known that I, ALFRED THURLOW, of Atherstone, in the county ofWarwick, England, have invented new and useful Improvements inLamp-Burners for Burning Various Kinds of Oils, which are set forth inand by the following specification and drawings.

My invention has for its object improvements in lamps, and hasreference, in particular, to that part of thelamp known as the wickcase,and to lamps where one or more flat wicks are used.

Hitherto it has been the custom in flat-wick lamps to trim the wickslightly round or convex for the purpose of producing a convex orround-topped flame, and thereis more or less variation caused in theflame of such lamps, because it is practically impossible to always trimthe wick exactly right, so that there is a variation in the flame and inthe light produced and in the smoke created by such lamps, and aconstant maximum perfection is not always obtained.

My invention consists in the combination, in a lamp-burner, of awick-tube andinclosingsleeve, either having a curved upper edge, that ofthe other being straight.

Instead of cutting the wick convex in shape, I make the top of thewick-tube concave, either of a regular or concentric curve, or aparabolic or other curve; but in either and every case the effect is toproduce a convex flame from a wick cut flat.

It will readily be understood that a wick may be out quite flat withoutvariation; but to avoid even the risk of any slight variation I providean outer case or cases, whether there be one or more wick-tubes, toslide up and over the wick-tubes by a lever, spring, or other convenientdevice, so that when the outer case is lifted up to a little above thecone or top of the burner it forms a guide for the scissors, and it isvery easy, therefore, to cut the wick level to it, and thus insure anabsolutely regular flat shape for thewick.

In case of lamps requiring to burn without chimneys, I make the top ofthe wick-tube convex and cover it with an outer slide, so as toregulatethe flame.

I will now describe my invention, having respect to the accompanyingsheet of drawings.

Figurel is a sectional elevation of a burner suitable forburnin gvolatile oilssuch as petroline or petroleumand is shown with thewicktube A concave, being formed to the curve of a parabola, which will:have the effect of producing a flame of convex form, but also to thecurve of a parabola,-which I have found to be the best in practice. Now, as there might be some ditficulty in cutting the top of the wickquite square and flat, I have shown the outside sliding case, b, whichis made to rise above the burner C, as shown clearly by Fig. 2, with thecharred wick d cl ready to be cut off to the top edge, b b, of the caseb, after which the case b would be lowered to its normal position, asshown in Fig. 1.

Fig. 3 illustrates a wick-tube, J, suitable for burning less volatileoilssuch, for instance, as sperm, or colza, or benzoline--and it isprovided with the outer case, k k, which fits the wick-tube J quitetightly, and is set near the top, thus leaving the corners Z lot thewick exposed to the flame, by which means I-am enabled to burn such oilswithout a chimney,

and almost without the slightest smell, and

with a clear and beautiful light.

Fig. 5 is a modification of the one shown by Fig. 3, and would answerthe same purpose very nearly. In this view the outer slide, m m, on thewick-case N is hollowed at the top part, on m m, which exposes thecorners p10 of the wick in a similar manner to the previous figure;

or the wick-tube N might be made quite flat, and all the hollow producedin the outer ease, m.

Fig. 4 is another modification, showing an arrangement by which I canmake a flame almost of any desired width by forming a series of curvesor corrugations, r r r,

In Fig. 6 is shown a modification in which the wick-tube is flat on top,and serves as the guide in cutting the wick, while the curved slide issecured to the burner by feathers e 0.

My invention is equally applicable to lamps having more than one wick,which will be readily understood by any practical lamp-maker.

The various lamp-burners shown may also be used in stoves for heatingpurposes.

Having now described my said invention of improvements in lamps, I wouldhave it clearly understood that I do not confine myself to the exactshapes shown in the drawings for the various parts, nor to the amount ofcurve given to the wick tubes and cases, as these may be considerablyvaried, according to the design of the lamp and the various oils to beused.

I am aware that a wick-tube having a concave top or upper edge is notbroadly new, and such I do not claim but What I do claim is 1. Thecombination, in a lamp-burner, of a wick-tube having a curved upperedge, as set forth, with an inclosing-tube having a straight upper edge,whereby the shape of the flame is determined and facility afforded forsevering the Wick on a line at right angles to its edges.

ALFRED THURLOW.

Witnesses:

JAMES EVERI'IT,

MARK MINGAY,

'Both of Atherstone.

